test: align contract inventory with package excludes

src/plugins/contracts/registry.contract.test.ts

@@ -1,3 +1,5 @@
+import fs from "node:fs";
+import path from "node:path";
 import { describe, expect, it } from "vitest";
 import { uniqueSortedStrings } from "../../plugin-sdk/test-helpers/string-utils.js";
 import { loadPluginManifestRegistry, type PluginManifestRecord } from "../manifest-registry.js";
@@ -9,6 +11,34 @@ import {
 } from "./registry.js";
 
 describe("plugin contract registry", () => {
+  function collectExcludedPackagedExtensionDirs(): ReadonlySet<string> {
+    const packageJson = JSON.parse(
+      fs.readFileSync(path.join(process.cwd(), "package.json"), "utf-8"),
+    ) as {
+      files?: unknown;
+    };
+    if (!Array.isArray(packageJson.files)) {
+      return new Set();
+    }
+    const excluded = new Set<string>();
+    for (const entry of packageJson.files) {
+      if (typeof entry !== "string") {
+        continue;
+      }
+      const match = /^!dist\/extensions\/([^/]+)\/\*\*$/u.exec(entry);
+      if (match?.[1]) {
+        excluded.add(match[1]);
+      }
+    }
+    return excluded;
+  }
+
+  const excludedPackagedExtensionDirs = collectExcludedPackagedExtensionDirs();
+
+  function isPackagedCorePluginId(pluginId: string): boolean {
+    return !excludedPackagedExtensionDirs.has(pluginId);
+  }
+
   function expectUniqueIds(ids: readonly string[]) {
     expect(ids).toEqual([...new Set(ids)]);
   }
@@ -24,7 +54,7 @@ describe("plugin contract registry", () => {
 
   function resolveBundledManifestPluginIds(predicate: (plugin: PluginManifestRecord) => boolean) {
     return loadPluginManifestRegistry({})
-      .plugins.filter((plugin) => predicate(plugin))
+      .plugins.filter((plugin) => isPackagedCorePluginId(plugin.id) && predicate(plugin))
       .map((plugin) => plugin.id)
       .toSorted((left, right) => left.localeCompare(right));
   }
@@ -176,7 +206,7 @@ describe("plugin contract registry", () => {
     const bundledWebSearchPluginIds = resolveManifestContractPluginIds({
       contract: "webSearchProviders",
       origin: "bundled",
-    });
+    }).filter(isPackagedCorePluginId);
 
     expect(
       uniqueSortedStrings(